The following publications are possibly variants of this publication:
- A multiple-level visual secret-sharing scheme without image size expansionYung-fu Chen, Yung-Kuan Chan, Ching-Chun Huang, Meng-Hsiun Tsai, Yen-Ping Chu. isci, 177(21):4696-4710, 2007. [doi]
- A novel multiple-level secret image sharing schemeYining Liu, Qi Zhong, Ming Xie, Zu-Bin Chen. mta, 77(5):6017-6031, 2018. [doi]